Air line oiler



y 8, 1952 WP. FREAS 2,602,523

AIR LINE OILER Filed Sept. 2, 1949 v INVENTOR. 17/4502 P. FEE/4S,

BY 7i 'mmflmz 47am:

47'7'01Q/VEY6i Patented July 8, 1952 I This invention relates to airline'oi'lers, and more particularly to a device which may be connectedinto an air line to supply oil'to compressed air operated tools, such asrock drills, riveting hammersetcetera. Itis among the .ob-- jects of theinvention to providean improved air line oiler of simplifiedconstruction which can be connected directly into an air line, and iseffective to meter oil into the air passing through such oil line andcan lee-adjusted to vary the amountof oil so metered to accommodate theoil supply to variations in the number of tools connected to the airline, which provides means for filtering the oil supplied to the oilerand refiltering the oil supplied by the oiler to the air in theFair-"line, which provides-:no obstruction to compressed air passingtherethrough, and which is strong ,anddurable in construction, simpleand economical to manufacture, and easy to install and adjust. Y

Other objects and advantages will become apparent from a consideration"of the following description and the appended claims in conjunctionwith the accompanying drawing, wherein:

Figure 1 is aside elevation of an air line oiler illustrative of theinvention, the major'portion of the oileribeing broken away and shown incross-sectionto better illustrate the construction thereof;

Figure 2 is an end elevation of the air line oiler illustrated in Figure1;

Figure 3 is a cross-section on the line 3-4 of Figure 1; and

Figure 4 is perspective view of a filter bushin constituting anoperative component of the oiler.

With continued reference to the drawing, the

oiler comprises a hollow, substantially globular body In having atubular conduit I l extending substantially diametrically therethroughand having outwardly-extending tubular =bosses I 2 and I3 at therespectively-opposite ends of the conduit ll. 1 The body Ill, conduitII, and bosses l2 and I3 are preferably integrally formed by asuitablemethod, such as casting, from a strong and corrosion-resisting metal,such as brass.

The bosses l2 and I3 are provided with polygonal, external surfacesproviding contiguous flat faces 14 for receiving a wrench or anequivalent tool to facilitate connecting the oiler into anair line, andare provided internally with screw threads IE to receive terminalfittings on the two parts of the air line connected to the oiler.

The body It! has a diameter materially greater than the diameter of thetubular conduit H and 1 Claim. (01. 184-551 provides an annular-oilreservoir the tubular conduit.

Intermediate its length, the tubular'conduit'is provided with at leasttwo orifices, assindic'ated at ll' and 18, through which'oil may passfrom the reservoir l6 into the conduit and thus, into compressedairpassing the conduit H.

1-, FA tubular, cylindrical bushing ll! of porous material, such asporous bronze, is seated in the conduit II in position to cover theorifices ll through the interior of and It, so that oil flowing throughthe orifices have to flow through the porous filter I-S'befom reachingthe air passing through the cond'uit H. This filter prevents any foreignmaterial, such as grit or scale, from passing into-the air, or frompassing from the air into the oil in the oiler'and also has a wickeffect in facilitat ing the passage of the oil into the-air'fiowing:

screw threads 2|, and at its inner end with an inwardly-directed,annular flange or shoulder 22. A 'cylindrical sleeve 23 is disposed inthe boss 20 and has at one end an outwardly-extending anm'ilar fiange 24which rests on the internal flange 2250f the boss, and this sleeveextends inwardly of; the body from the inner end of the boss 20, asgisclearly. illustrated in Figure 1.

A circular filter screen 25 is marginally secured injfthe sleeve 23 nearthe inner end of the latter. and two nuts 26 and 21 are secured to thisscreen atfrespectively-opposite sides thereof and are unlformly spacedannularly from the internal surface of thesleeve 23. A valve screw 28 isthreaded through the nuts 26 and 21 and extends through the filterscreen toward the orifice l8. At its end adjacent the orifice the valvescrew 28 has a conical or pointed end 29, which cooperates with theorifice l8 to regulate the amount of oil flowing through this orifice,and at its outer end the valve screw 28 is provided with a tool slot 30by means of which the valve screw can be adjusted relative to theorifice.

The orifice I! has a capacity suilicient to supply the oil required forone or two tools connected to the air line. Under these conditions thevalve screw 28 will be adjusted to close off the orifice 18." If moretools are added to the line, the valve aeoaszs 3 4 screw 28 will beadjusted to open the orifice l8 The invention may be embodied in otherspesufiiciently to supply the required oil for the adcific forms withoutdeparting from the spirit or ditional tools. essential characteristicsthereof. The present The filter screen 25 filters oil poured into theembodiment is, therefore, to be considered in all body It! through thefilling opening provided by 5 respects as illustrative and notrestrictive, the the boss 20, so that the oil is filtered as it issupscope of the invention being indicated by the plied to the oilreservoir l6. This oil is re-filter-ed appended claims rather than bythe foregoing by the filter bushing H! as it is supplied from thedescription, and all changes which come within reservoir l fi to the airpassing through the coneaning and range of equivalency of the duit n. gi 1- v 1- p re"*re, in e Lernbraced An externally screw-threaded'plug3lis thread-" therein. ed into the boss 20 to provide a closure for theWhat is claimed is; filler opening provided by the boss, and this plug-An air line oiler comprising a hollow body havis provided, in its innerend, wi W611 r 5 7 -2 51 ring a tubular air conduit extendingtherethrough cess 32 providing a space for the outer end of andproviding interiorly thereof an annular oil the valve screw 28 and inits outer end witha 1 reservoir surrounding said conduit, said conduittool slot 33 for tightening the-closurepl ugin the r,havingintermediate, its length t; least t 01$ boss. At its outer end theplug 3| is provided fices, a tubular, porous filter in said conduit cov-With an a a flange and the boss 'is ro =ering saidorifices, means ateach end of said convided with a counterbore 35 receiving this flange-20 duit for connecting said foiler into an air line, an

The bottom surface of theflan'ge and the bottom. internalapertured bossin said body havingscrew surface of the counterbore 35-provide opposedthreads" therein; -a-filter '-screen"seated in said annularshoulders,and a sealinggasket-3B is disboss; -a-screw valve v carried by saidscreen and posed=between the shoulders to provide an air: cooperatingwith'one ofisaid orifices to regulate tightseal t lth closure plug 3lofthe body the .fiow of oilfrom saidreservoirtinto said: con- |n d uit,andascrew-threaded closure plug for said When compressed-air passesthrough a -comb y pressed air line to a tool which is in-operation, vthe'operationiof the tool causes pulsations in the 1 v wt? a a a 1pressure of' the air in the line. These pulsations v I REFERENCES CITEDWiLBUR 1 "FREAS.

in t ea r p e effective to feed -o The following references are ofrecord in'the' from the reservoir. l6 into the conduit ll, since; f (ifthis patent:

when'the'air pressure is high, air willfiow through 1 e I r I the porousfilter l9 and the orifices n and I8 into a E ES AT N the body into buildup -a pressure in the body .1 Number Name i, 7 Date,

substantially'equal' to the pressure of the air in 0 1471713 Leonard. LApr'.4;1916- the air line, and when the pressure in the air line1,669,375" Ihrmark; 'M 92 is 'reducedfihe'higher pressure inthe body [0will- 2,073,009. I, Hersey- Mar. 9, 1937 force'some of the oilthrough-the orifices and 2,111,583 DeMooy Mar.'22,1938' the filterbushing 19 into the interior of the con-' duit l l where it is picked upbythe airflowing through this conduit. z

